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sftp-common.c

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1/* $OpenBSD: sftp-common.c,v 1.31 2018/09/13 15:23:32 millert Exp $ */-
2/*-
3 * Copyright (c) 2001 Markus Friedl. All rights reserved.-
4 * Copyright (c) 2001 Damien Miller. All rights reserved.-
5 *-
6 * Redistribution and use in source and binary forms, with or without-
7 * modification, are permitted provided that the following conditions-
8 * are met:-
9 * 1. Redistributions of source code must retain the above copyright-
10 * notice, this list of conditions and the following disclaimer.-
11 * 2. Redistributions in binary form must reproduce the above copyright-
12 * notice, this list of conditions and the following disclaimer in the-
13 * documentation and/or other materials provided with the distribution.-
14 *-
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR-
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES-
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.-
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,-
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,-
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY-
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT-
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF-
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.-
25 */-
26-
27#include "includes.h"-
28-
29#include <sys/types.h>-
30#include <sys/stat.h>-
31-
32#include <grp.h>-
33#include <pwd.h>-
34#include <stdio.h>-
35#include <stdlib.h>-
36#include <string.h>-
37#include <time.h>-
38#include <stdarg.h>-
39#ifdef HAVE_UTIL_H-
40#include <util.h>-
41#endif-
42-
43#include "xmalloc.h"-
44#include "ssherr.h"-
45#include "sshbuf.h"-
46#include "log.h"-
47#include "misc.h"-
48-
49#include "sftp.h"-
50#include "sftp-common.h"-
51-
52/* Clear contents of attributes structure */-
53void-
54attrib_clear(Attrib *a)-
55{-
56 a->flags = 0;-
57 a->size = 0;-
58 a->uid = 0;-
59 a->gid = 0;-
60 a->perm = 0;-
61 a->atime = 0;-
62 a->mtime = 0;-
63}
never executed: end of block
0
64-
65/* Convert from struct stat to filexfer attribs */-
66void-
67stat_to_attrib(const struct stat *st, Attrib *a)-
68{-
69 attrib_clear(a);-
70 a->flags = 0;-
71 a->flags |= SSH2_FILEXFER_ATTR_SIZE;-
72 a->size = st->st_size;-
73 a->flags |= SSH2_FILEXFER_ATTR_UIDGID;-
74 a->uid = st->st_uid;-
75 a->gid = st->st_gid;-
76 a->flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;-
77 a->perm = st->st_mode;-
78 a->flags |= SSH2_FILEXFER_ATTR_ACMODTIME;-
79 a->atime = st->st_atime;-
80 a->mtime = st->st_mtime;-
81}
never executed: end of block
0
82-
83/* Convert from filexfer attribs to struct stat */-
84void-
85attrib_to_stat(const Attrib *a, struct stat *st)-
86{-
87 memset(st, 0, sizeof(*st));-
88-
89 if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
a->flags & 0x00000001Description
TRUEnever evaluated
FALSEnever evaluated
0
90 st->st_size = a->size;
never executed: st->st_size = a->size;
0
91 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
a->flags & 0x00000002Description
TRUEnever evaluated
FALSEnever evaluated
0
92 st->st_uid = a->uid;-
93 st->st_gid = a->gid;-
94 }
never executed: end of block
0
95 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
a->flags & 0x00000004Description
TRUEnever evaluated
FALSEnever evaluated
0
96 st->st_mode = a->perm;
never executed: st->st_mode = a->perm;
0
97 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
a->flags & 0x00000008Description
TRUEnever evaluated
FALSEnever evaluated
0
98 st->st_atime = a->atime;-
99 st->st_mtime = a->mtime;-
100 }
never executed: end of block
0
101}
never executed: end of block
0
102-
103/* Decode attributes in buffer */-
104int-
105decode_attrib(struct sshbuf *b, Attrib *a)-
106{-
107 int r;-
108-
109 attrib_clear(a);-
110 if ((r = sshbuf_get_u32(b, &a->flags)) != 0)
(r = sshbuf_ge...->flags)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
111 return r;
never executed: return r;
0
112 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
a->flags & 0x00000001Description
TRUEnever evaluated
FALSEnever evaluated
0
113 if ((r = sshbuf_get_u64(b, &a->size)) != 0)
(r = sshbuf_ge...a->size)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
114 return r;
never executed: return r;
0
115 }
never executed: end of block
0
116 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
a->flags & 0x00000002Description
TRUEnever evaluated
FALSEnever evaluated
0
117 if ((r = sshbuf_get_u32(b, &a->uid)) != 0 ||
(r = sshbuf_ge...&a->uid)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
118 (r = sshbuf_get_u32(b, &a->gid)) != 0)
(r = sshbuf_ge...&a->gid)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
119 return r;
never executed: return r;
0
120 }
never executed: end of block
0
121 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
a->flags & 0x00000004Description
TRUEnever evaluated
FALSEnever evaluated
0
122 if ((r = sshbuf_get_u32(b, &a->perm)) != 0)
(r = sshbuf_ge...a->perm)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
123 return r;
never executed: return r;
0
124 }
never executed: end of block
0
125 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
a->flags & 0x00000008Description
TRUEnever evaluated
FALSEnever evaluated
0
126 if ((r = sshbuf_get_u32(b, &a->atime)) != 0 ||
(r = sshbuf_ge...->atime)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
127 (r = sshbuf_get_u32(b, &a->mtime)) != 0)
(r = sshbuf_ge...->mtime)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
128 return r;
never executed: return r;
0
129 }
never executed: end of block
0
130 /* vendor-specific extensions */-
131 if (a->flags & SSH2_FILEXFER_ATTR_EXTENDED) {
a->flags & 0x80000000Description
TRUEnever evaluated
FALSEnever evaluated
0
132 char *type;-
133 u_char *data;-
134 size_t dlen;-
135 u_int i, count;-
136-
137 if ((r = sshbuf_get_u32(b, &count)) != 0)
(r = sshbuf_ge... &count)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
138 fatal("%s: buffer error: %s", __func__, ssh_err(r));
never executed: fatal("%s: buffer error: %s", __func__, ssh_err(r));
0
139 for (i = 0; i < count; i++) {
i < countDescription
TRUEnever evaluated
FALSEnever evaluated
0
140 if ((r = sshbuf_get_cstring(b, &type, NULL)) != 0 ||
(r = sshbuf_ge...d *)0) )) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
141 (r = sshbuf_get_string(b, &data, &dlen)) != 0)
(r = sshbuf_ge..., &dlen)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
142 return r;
never executed: return r;
0
143 debug3("Got file attribute \"%.100s\" len %zu",-
144 type, dlen);-
145 free(type);-
146 free(data);-
147 }
never executed: end of block
0
148 }
never executed: end of block
0
149 return 0;
never executed: return 0;
0
150}-
151-
152/* Encode attributes to buffer */-
153int-
154encode_attrib(struct sshbuf *b, const Attrib *a)-
155{-
156 int r;-
157-
158 if ((r = sshbuf_put_u32(b, a->flags)) != 0)
(r = sshbuf_pu...->flags)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
159 return r;
never executed: return r;
0
160 if (a->flags & SSH2_FILEXFER_ATTR_SIZE) {
a->flags & 0x00000001Description
TRUEnever evaluated
FALSEnever evaluated
0
161 if ((r = sshbuf_put_u64(b, a->size)) != 0)
(r = sshbuf_pu...a->size)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
162 return r;
never executed: return r;
0
163 }
never executed: end of block
0
164 if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) {
a->flags & 0x00000002Description
TRUEnever evaluated
FALSEnever evaluated
0
165 if ((r = sshbuf_put_u32(b, a->uid)) != 0 ||
(r = sshbuf_pu... a->uid)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
166 (r = sshbuf_put_u32(b, a->gid)) != 0)
(r = sshbuf_pu... a->gid)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
167 return r;
never executed: return r;
0
168 }
never executed: end of block
0
169 if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
a->flags & 0x00000004Description
TRUEnever evaluated
FALSEnever evaluated
0
170 if ((r = sshbuf_put_u32(b, a->perm)) != 0)
(r = sshbuf_pu...a->perm)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
171 return r;
never executed: return r;
0
172 }
never executed: end of block
0
173 if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
a->flags & 0x00000008Description
TRUEnever evaluated
FALSEnever evaluated
0
174 if ((r = sshbuf_put_u32(b, a->atime)) != 0 ||
(r = sshbuf_pu...->atime)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
175 (r = sshbuf_put_u32(b, a->mtime)) != 0)
(r = sshbuf_pu...->mtime)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
176 return r;
never executed: return r;
0
177 }
never executed: end of block
0
178 return 0;
never executed: return 0;
0
179}-
180-
181/* Convert from SSH2_FX_ status to text error message */-
182const char *-
183fx2txt(int status)-
184{-
185 switch (status) {-
186 case SSH2_FX_OK:
never executed: case 0:
0
187 return("No error");
never executed: return("No error");
0
188 case SSH2_FX_EOF:
never executed: case 1:
0
189 return("End of file");
never executed: return("End of file");
0
190 case SSH2_FX_NO_SUCH_FILE:
never executed: case 2:
0
191 return("No such file or directory");
never executed: return("No such file or directory");
0
192 case SSH2_FX_PERMISSION_DENIED:
never executed: case 3:
0
193 return("Permission denied");
never executed: return("Permission denied");
0
194 case SSH2_FX_FAILURE:
never executed: case 4:
0
195 return("Failure");
never executed: return("Failure");
0
196 case SSH2_FX_BAD_MESSAGE:
never executed: case 5:
0
197 return("Bad message");
never executed: return("Bad message");
0
198 case SSH2_FX_NO_CONNECTION:
never executed: case 6:
0
199 return("No connection");
never executed: return("No connection");
0
200 case SSH2_FX_CONNECTION_LOST:
never executed: case 7:
0
201 return("Connection lost");
never executed: return("Connection lost");
0
202 case SSH2_FX_OP_UNSUPPORTED:
never executed: case 8:
0
203 return("Operation unsupported");
never executed: return("Operation unsupported");
0
204 default:
never executed: default:
0
205 return("Unknown status");
never executed: return("Unknown status");
0
206 }-
207 /* NOTREACHED */-
208}-
209-
210/*-
211 * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh-
212 */-
213char *-
214ls_file(const char *name, const struct stat *st, int remote, int si_units)-
215{-
216 int ulen, glen, sz = 0;-
217 struct tm *ltime = localtime(&st->st_mtime);-
218 const char *user, *group;-
219 char buf[1024], lc[8], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1];-
220 char sbuf[FMT_SCALED_STRSIZE];-
221 time_t now;-
222-
223 strmode(st->st_mode, mode);-
224 if (remote) {
remoteDescription
TRUEnever evaluated
FALSEnever evaluated
0
225 snprintf(ubuf, sizeof ubuf, "%u", (u_int)st->st_uid);-
226 user = ubuf;-
227 snprintf(gbuf, sizeof gbuf, "%u", (u_int)st->st_gid);-
228 group = gbuf;-
229 strlcpy(lc, "?", sizeof(lc));-
230 } else {
never executed: end of block
0
231 user = user_from_uid(st->st_uid, 0);-
232 group = group_from_gid(st->st_gid, 0);-
233 snprintf(lc, sizeof(lc), "%u", (u_int)st->st_nlink);-
234 }
never executed: end of block
0
235 if (ltime != NULL) {
ltime != ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
236 now = time(NULL);-
237 if (now - (365*24*60*60)/2 < st->st_mtime &&
now - (365*24*...st_mtim.tv_secDescription
TRUEnever evaluated
FALSEnever evaluated
0
238 now >= st->st_mtime)
now >= st-> st_mtim.tv_secDescription
TRUEnever evaluated
FALSEnever evaluated
0
239 sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
never executed: sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime);
0
240 else-
241 sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
never executed: sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime);
0
242 }-
243 if (sz == 0)
sz == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
244 tbuf[0] = '\0';
never executed: tbuf[0] = '\0';
0
245 ulen = MAXIMUM(strlen(user), 8);
((strlen(user)) > (8))Description
TRUEnever evaluated
FALSEnever evaluated
0
246 glen = MAXIMUM(strlen(group), 8);
((strlen(group)) > (8))Description
TRUEnever evaluated
FALSEnever evaluated
0
247 if (si_units) {
si_unitsDescription
TRUEnever evaluated
FALSEnever evaluated
0
248 fmt_scaled((long long)st->st_size, sbuf);-
249 snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8s %s %s",-
250 mode, lc, ulen, user, glen, group,-
251 sbuf, tbuf, name);-
252 } else {
never executed: end of block
0
253 snprintf(buf, sizeof buf, "%s %3s %-*s %-*s %8llu %s %s",-
254 mode, lc, ulen, user, glen, group,-
255 (unsigned long long)st->st_size, tbuf, name);-
256 }
never executed: end of block
0
257 return xstrdup(buf);
never executed: return xstrdup(buf);
0
258}-
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